#include <cstdio>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;
int main()
{
	int ckind[30];
	char s[110];
	while(scanf("%s",s)!=EOF)
	{
		int cnt = 0;
		memset(ckind,0,sizeof(ckind));
		int len = strlen(s);
		for(int i = 0;i<len;i++)
		{
			int x = s[i]-'a';
			if(!ckind[x])
			{
				cnt++;
				ckind[x] = 1;
			}
		}
		if(cnt%2) printf("IGNORE HIM!\n");
		else printf("CHAT WITH HER!\n");
	}
} 
